OSAKA -- Police arrested a former security guard Monday on suspicion that he set fire to an automated teller machine cubicle in central Osaka in June, causing an explosion and seriously injuring himself.

Satoshi Ueno, 37, a resident of Osaka, was taken into custody for alleged arson. Police quoted him as saying he set the ATM on fire to cover up his theft of cash he was supposed to have delivered to the ATMs in the booth. Police are also pursuing a theft charge.

At the time of the blast, Ueno was working for the security firm Toyo Tec Co., which was tasked with delivering cash to ATMs.